New form of matter: Exotic hadron with two quarks, two anti-quarks confirmed

Physicists have confirmed the existence of exotic hadrons — a type of matter that cannot be classified within the traditional quark model. “We’ve confirmed the unambiguous observation of a very exotic state — something that looks like a particle composed of two quarks and two anti-quarks,” said one of the scientists. “The discovery certainly doesn’t fit the traditional quark model. It may give us a new way of looking at strong-interaction physics.”

from Physics News — ScienceDaily

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